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Instran Nitrate Ion Online Concentration Meter (Colorimetric Method)

Instran Nitrate Ion Online Concentration Meter (Colorimetric Method)

High absorbance can be obtained, allowing for high-precision measurements even at low concentrations.

Nitrate ions (NO₃⁻) are reduced to nitrite ions (NO₂⁻) under alkaline conditions. The resulting nitrite ions are then measured through a diazotization reaction. This reaction produces a vivid azo dye, and the intensity of the color is proportional to the concentration of nitrate ions. It should be noted that this measurement method assumes that there are no nitrite ions originally present in the sample.

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Instran Online Nitrate Concentration Meter

Instran Online Nitrate Concentration Meter

Continuous measurement of nitrate concentration in water is possible!

Method - Ion Selective Electrode Reagent 1 is added before analysis to activate the electrode. After that, the first measurement is taken. Next, a small amount of a high-concentration nitrate solution is added, and a second mV measurement is performed to calculate the results. If an extraction solution is used, cleaning with an ammonia-based cleaning solution is necessary after analysis to prevent cross-contamination. Many probes are affected by interference from nitrite and chloride, but in this method, using the extraction solution at the beginning of the analysis completely removes the influence of these two ions. Therefore, the only ion affecting the measurement is the nitrate ion (NO₃⁻).

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  • Nitrate ion concentration meter

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